Door-check and pivotal support.



0. KATZENBERGER. DOOR CHECK AND PIVOTAL SUPPORT.

APPLICATION FILED NOV. 6, 1911.

Patented Apr. 1, 1913.

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. Patented spied, 1913'.

Application filed November 6, 1911. Serial do. 653,888.

To 0?! whom-513mm, concern lie it known that I, Osom Kwzcxnnnesu, a citizen of the United States, residing at Chicago, in the county of Cool: llld Eitote of Illinois, have invented :1 new and useful linp'roveiuent in DOOI Cl1GClS and Pivotal Sup ports, of which the following is a specifics.- tion.

My invention relutes to certain new and useful improvements in a door checlr and pivotal support, and is fully described and explained in the specification and shown in the accompanying drawing, in which Figure l is a central longitudinal sect-ion throughmy device as positioned in s door, the door being shown open; Fig. 2 is a section int-he line 2 of Fig. 1, and Fig. 3 is a cylinder.

horizontal section in the line 3 of 2.

Referring to the drawings, 4 is a cylinder let into the top edge of the door and formed with a top plate 5 riveted into and secured to the top part of the door. The cylinder 4 has on one side an auxiliary oil-reservoir 6 connecting through an opening 7 with the lower part of the cvlinder 4 and closed at ts upper end by a plug 8, which may be removed for filling purposes. Vertically m0vable Within the cylinder t is e piston connected to a stem 10. The piston 9 is provided with vertical openings 11. closed by ball-valves 12 of such a character that oil can readily pass downward through the piston, but not upward. The piston is provided on one side withe vertical groove 13 (Fig. 2) through which a predetermined amount of oil can pass the piston. It is found satisfactory to determine the size of this opening once for all at Ll'lfi factory, and thereby dispense with all adjustment-dovices.

Wedged in the cyliider above the piston are two annular plates 15 and i5 '-'hich clamp apacking piece 1'? between from, thereby substantially preventing the leakage of oil along the piston rod or stem. The piston rod is normally held up by e spring 18. The walls of the cylinder are traversed by vertical slots across which extends a steel pin 20, the center of which rests upon the upper end of the piston rod or stem 10. These slots 19 are closed by a, plate 21 of sheet metal sprung around the Above the pin 20 is ecsun-znember 22 the lower part of which as the cam -track,

plainly illustrated in the drawings, bears against the rollers 23 carried by the pin 20. The cumunember is heldin place Within the cylinder by a ring 24 screwed down upon it and its upper end is carried upward to form a flattened tip which engages 21 CDT:

respondingly-sheped opening in a. plate26' on the door-frame.

From the foregoing constrnction'it will be evident that as the door cun1-memher-22 will remain stetionary and the cylinder 4 and parts carried thereby will rotate, these parts being carried by the door. The door is thus iven n free pivotal been ing at its upper end." i so arranged that the uppermost port of its curved lower edge or track, form of construction, door-opening While the pin20 lies across the door. Thus when the door isclosedt-he pin lies on the lc-West part oft-he (32151. w nd is swung the A The oam-member is in the present' lies lengthwise of the] when it is openedat right angles it lies.

on the highest point of the earn. As the door is opened the spring presses'up the piston as fast as the movement of thcpin sci and its rollers upon'the cam-member per-' mits thus assisting in such opening move ment, any oil which is shove the piston passing down through the valves, provided for the purpose, into the spore below the piston. When the door is released and tends to swing shut under the influence of any spring vihich may be attached to it, the piston is forced down by the action of the cam upon it end only moves fast as is permitted by the passage of the oil. through the groove 13 w ich, as before stated, acts as a by-pass. Any leakage of oil which so ply in the reservoir.

Vhile this construction has been described in detail as the preferred form of embodying my present invention and While the exact form shown is believed to have advantages in the Way of construction and arrangement, still it is msnifes" chat it can be varied muteriaily Without departing from the spirit of the invention. ltwill also be seen that the invention furnishes it completely invisible check which serves as Well, as the upper hinge of e pivoting hinge door: The present device cooperates admirably as Well with any double-swinging be mounted at the bottom of the door in accordence with usual practice, either in the door or in the door proper. The device is also advantageous in that if desired, as is may occur from, time to time Wlll be compensated for h the "pivot hinge which may actually the case in the present construction;

that part of the cam upon which the pinrollers rest when the door is closed can be slightly flattened so that the checking action will be less just as the door is swinging to. In a double-swinging door, this is a point of considerable importance because a thoroughly efficient check of many ordinary types may prevent the door from going absolutely shut, as the spring action Which moves it drops to a minimum. By properly moditying or varying the piston-stem the checking action of the present device can be made of any desired amount at each time or period of the movement of the door.

What I claim as new, and desire to secure by Letters Patent, is v 1. A combined check and pivotal sup ort for a door, comprising a cylinder, a Xed member having pivotal engagement with said cylinder, and means in said cylinder adapted to resist the movements of the door toward the closed position thereof and there by check the same, and to assist in move ments of said door in directions to open the same.

2. As a new article of manufacture a combined door-check and pivotal support for a orine i7 voir adjacent the cylinder and communicating' therewith, and valves for controlling the passage of the fluid into the cylinder and from one side of the piston to the opposite side thereof, the first of said piston-actuating means serving to resist the movements of the door toward the closed position thereof and thereby check the same, and the second of said piston-actuatin means serving to assist in movements of said door in directions to open the same.

3. A combined check and pivotal support for a door, comprising a cylinder, a piston therein a valve-controlled passa e from the space above to the space below tie piston, a stem tor the piston, packing-means about the stem, a cylindrical member adapted to be stationarily mounted \vithinthe door-frame and fitting Within the cylinder to afford pivotal support to the door and shaped on its lower face to form a cam, a pin running on said cam engaging the piston-stem and guided in slots in the cylinder well, an annular dish: above said cylindrical member to hold the same in position, an auxiliary chamber to one side of the cylinder, and, a valve-controlledport between the cylinder and said chamber.

OSCAR KATZENBERGER.

In presence of- A. U. Tr-ronmn, R. A. SCHAEFERr 

